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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=8 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/alg/arraylist.internal.h"
#include "libc/bits/bits.h"
#include "libc/bits/pushpop.h"
#include "libc/calls/calls.h"
#include "libc/errno.h"
#include "libc/macros.internal.h"
#include "libc/mem/mem.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/fflush.internal.h"
#include "libc/stdio/internal.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/o.h"
/**
* Blocks until data from stream buffer is written out.
*
* @param f is the stream handle
* @return is 0 on success or -1 on error
*/
int fflush(FILE *f) {
size_t i;
ssize_t rc;
if (!f) {
for (i = __fflush.handles.i; i; --i) {
if ((f = __fflush.handles.p[i - 1])) {
if (fflush(f) == -1) return -1;
}
}
} else if (f->fd != -1) {
while (f->beg && !f->end && (f->iomode & O_ACCMODE) != O_RDONLY) {
if ((rc = write(f->fd, f->buf, f->beg)) == -1) {
f->state = errno;
return -1;
}
if (rc != f->beg) abort();
f->beg = 0;
}
} else if (f->beg && f->beg < f->size) {
f->buf[f->beg] = 0;
}
return 0;
}
textstartup int __fflush_register(FILE *f) {
size_t i;
struct StdioFlush *sf;
sf = &__fflush;
if (!sf->handles.p) {
sf->handles.p = &sf->handles_initmem[0];
pushmov(&sf->handles.n, ARRAYLEN(sf->handles_initmem));
__cxa_atexit(fflush, NULL, NULL);
}
for (i = sf->handles.i; i; --i) {
if (!sf->handles.p[i - 1]) {
sf->handles.p[i - 1] = f;
return 0;
}
}
return append(&sf->handles, &f);
}
void __fflush_unregister(FILE *f) {
size_t i;
struct StdioFlush *sf;
sf = &__fflush;
sf = pushpop(sf);
for (i = sf->handles.i; i; --i) {
if (sf->handles.p[i - 1] == f) {
pushmov(&sf->handles.p[i - 1], NULL);
return;
}
}
}
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